This is a simple widget that lets you monitor your gamepad controller battery while playing.

Limitations:

• This app has been tested with Original Xbox Controllers ONLY. Can’t confirm if it works with different brand/type of controllers.
• Battery levels are correctly read only if the controller is connected via the USB wifi dongle. If your controller is connected via bluetooth battery level always shows 10%. This is an API limitation. I’m currently working on a solution.
• Battery level is purely indicative.